Rivet brace



Dec. 19, 1922.

1,439,343; J. A. TAYLOR.

RIVET BRACE.

man Nov. I8, 1918.

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59 'a-T' 91 FL gfiia i- 27 9 A Z \F 7 -INVENTOR 1 0 all whom it mayconcern;

Patented Dec. 19,

hearse stares smear series,

JAMES A. TAYLOR, 501E GLEN RIDGE, NEVJS'ERSEY.

i er-var BEACE. 1

Application filed November 18, 1918. Serial No; 263 98 1 l isms A.

The processor riveting requires that a firm brace be placed behind thehead of a rivet to keep the smile rigidly in the rivet hole While theend furthest from the head being hammered (lorrn. For this purpose thebrace behinclthe rivet should be rigid and unyielding. The method oiibraci usually in vogue consists of heavy s hammer hehl in place back orthe rivet by aworkman. T his method has many disadvantages and thehammer is driven bacl; by the blows of the rireting tool and thismovement permits an element otplay in the rivet and prevents the rivetpower lost by being; transmittal totlic movable hammer. is blow ilelivcl to a solid rivet shaft would spread the shaft at all parts arul thuswould. till the rivet hole quickly instead of at tlu l M the processwhen the rivet is colii, tor re reason that the movement of the riretback .u'ul forth prci'cilts its parts being rveilgzcil into the irregularities lithe taco oi the rivet hole. The process calls fo,gtrcatstrength by the hohleron, who inevitably becomes tired Eliltlslows up anti he the rivet he is the one who sets the pace anil it he istired and slows up he wastes time oi the other three or four gang whichin the aggre 'ate is a very serious matter, in any event, there is aserious loss of time because the holcleuon must do all his acts inaccession and is unable to proceed to a second operation While an otheris being; perlornieu.

'llie objects oi my invention are to proriuc a device which willaii'l inall the operations of bracing a rivet.- rrhilc the sanie is being drivenby providii niecnanujol brace, which will hold the rivet fi..n1ly inTnrrioig a es, residing at the as; driven tightly anti. snugly anti, inadilitloir. much" is the man who inserts" he men in toe i-Tsicalassistance by the is conserved to the utmost. The freedom from ar andexhaustion on the part of the holder-on enables h ill toWoik cont rously at uniform speecl io'ithout tiring To such GililS my saidinventioninits preferred l' O'LIH COZlEiSQS olf a brace bar attached byadjustable plugs to the material to be riveted together, a 'n'rovzible',sliiling collar mounted on this brace bar supporting a inevable bracepart anal ineansl'or changing the position to such brace part comprisinga cain part, a ratchet'lockin'g part in connection With the campart bymeans 01 a stiff coil opening and a leverffor actuating the ratchet partand a pawl for lockin the same in position. The ends of thebrace bar areprovided with slots into whichlit the securing plugs and by reason ofWhich slots.

the plugs have considerable latitude Oi movement to allow-being insertedinto rivet notes placed. in regular positions.

ficationot which. the accompanying iii-cvigs foriu a part; whereinletters ornunierals oi reference designate like or clu'uir partswherever ei'al views and in \vhich: v

l i ourc l. is a top riciv oi? theen SliONfliiQ the bi:

cc bar secured to the tcrial to be rivet-ell together anti in relaion tothe rivet holes, the slidingcollar on i rivet bar supporting a bracepart nieans' said invention is tullyfshown, (ls- 'scribeil and claimedin the following specient touncl throughoutthe sevire (levies icanractuating part Wlilfl the lever and spring for actuating ancl theratchet and pawl vfor locking the same anclthe cam part-in position andthe set scrcav for curing;- the niov; able collar on thebrace bar inoperatire pm sition. .i

l igure3 is a sitle View in detail of the u'iovable slidin collarsuonortin the rivet b i l a: .i

bra-eel the rampart for chano '9' the nosition of the latter. thelocking part vritlrthe lever and spring foractuating and the ratchetanrlpavvl tor loc tingthe same and the cam part in position; the setscrew the movable collar on the brace bar and showing; the brace barincross section.

Figure t-is an end view in detail o t the movable sliding collar,supporting; the ire-ti for securing brace, the cam part for changing theposition of the rivet brace, the locking part with the lever and springfor actuating the cam part and the ratchet and pawl for locking the vpartly in detail.

on the collar B by means of the same in position, the bar connecting thecam part and the rivet brace and showing in dotted lines the positiontaken by the cam part, the rivet brace, and the connecting bar when atthe limit of motion.

Figure 5 is a side View of the rivet brace part. Figure 6 is a frontside view of the brace bar provided with plugs for securing the same tothe material to be'riveted together.

Figure 7 is a side view in detail of one of the plugs for securing thedevice to the ma terial to be riveted together, showing the shaftprojecting parts above andbelow the end of the brace bar and theprojecting part at the lowerend'of the plug, the wedge locking part forforcing the projecting part beneath the material to be riveted togetherand the spring for keeping the same in position,

and showing in dotted lines the position taken by the plug and the wedgepart when in locked position, all of which are shown in their relationto a rivet hole and the material to be riveted together and the end ofthe brace bar.

Figure 8 is a top view of the wedge looking part and of the securingplug with the projecting part at the lower end and showing incrosssection along the line aa of Figurei, the shaft of the securing plug andin full lines the top of. the rod for actuating the locking part.

. Figure 9 is a side view of one of the ends of the brace bar showingthe means for elevating the main part of the brace bar above thematerial to be riveted together and the plug for securing the bar tosuch material,

said new and improved rivet brace comprises a brace bar A, Figs. 1, 3and 6 on which is movably mounted a sliding collar B, Figs. 1, 2, 3 and4, which supports a brace C for holding a rivet firmly in place whilethesame is being driven by tool held on the opposite side of the materialto be riveted together.

The rivet brace C is movably mounted bar 1, Figs. 2,6, 4 and 5 passingthrough an aperture in the collar B. The downward movement of the braceC is limited by thecap 2 on the bar 1.

The brace C is provided with a strengthening part 3, Figs. 2, 3.4. and5, the inner face 4, Figs. 2, 3 and 5. of which abuts against the outerface of the collar B. The part 3 serves to strengthen the brace C and todis tribute the force of the riveting blow.

Loosely pivoted at the end of the collar B by the bolt 5, Figs. 2, 3 and4 is the cam part D having an egg or ovoidal shaped peri1n tate on thebolt 5 secured together by the slotted bar 18,

1 ,esasea eter, the horizontal diameter of which in the normal positionis greater than the vertical diameter. The upper face of the cam part Dabuts against the under face of a horizontalprojection 6 on the collarB, Figs. 3 and 4. The under face of the cam part D abuts against theupper face 7, Figs. 3 and 4 of the brace C.

Pivoted to the bolt 5, Figs. 1, 2, 3 and 4, adjacent to and outside of,the cam part D is the locking part E, whose right outer edge isconcentric with the corresponding edgeof the cam part D and is providedwith. a ratchet 8, Figs. 1, 2, 3 and 4. Secured to the face opposite theratchet face oft-he part E is the bar 9, Figs. 2, and 4, which passesthrough an aperture slightly larger than the bar 9 in. a projection 10of the cam part D and which is fitted at its outer end with a cap 11which is larger than the aperture in the projection 10. Around the bar9, Figs. 2 and 4, is placed a stiff coil spring 12 between theprojection 10 and the face of the part E. Secured to the collar B by thebolt 13, Figs. 2, 3 and 4, is the pawl 14, which is kept in engagementwith the ratchet 8 by the pressure of the flat spring 15, Figs. 2 and 3,on its upper face.v Secured to the part E, Figs. 1, 2, 3 and 4, is thelever lfiwhich is held in a vertical position when the part E is innormal and non-operative position. .Vhen the lever 16 is moved to theleft and downward Fig. 4, (as shown in dotted lines) the part E isrotated on the pivot 5 to the left and the face of the same pressesagainst the coil spring 15 which is in turn forced against the Thispressure causes :the cam part D to roand this rotation. brings intocontact with the face 7 of the brace C, Fig. 4, portions of the lowerface of the cam part D which are continuously further and furtherremoved from the pivot 5 and thus the brace C is forced downward untilthe point 17, Fig. 4, at the end of the cam part D is reached.

The brace C and the cam part D are loosely Figs. 2, 3 and 4. The bar 18is secured to the cam part D by the bolt 19inoving in the slot 20. Fig.4, and to the brace C by the bolt 21, Figs. 2, 3 and 4, As the cam partD is rotated, the bar 18 is moved to the rig the variation in thedistance hetvr bolts 19 and 21 is permitted by reason of the bolt'19moving in the slot llfhen the lever 16 and the cam part D are raised,the bar 18 raises the brace C, and thereupon the brace C and then'iovable collar B are ready to be moved into position to perform theoperation. of bracing another riv t.

upper face orthe brace i further 0;? the cam part D is prevented byreason projection 10 on the cam part D.

of the dog 22, Figs. 3 and 4;, on the cam part D coming into contactwith the dog 23 on the under face of the projection 6. When the cam partD has reached this position, continued pressure on the lever 16 furthercompresses the coil spring 12 and rotates the part E so that the pawl14: engages an advanced tooth of the ratchet 8. By this means the part Eis lockedagainst backward move ment and the coil spring 12 maintains thecam part D in the position in which it has been rotated and prevents theblows of the riveting tool from disengaging the same. The pawl 14; isprovided, Figs. 3 and 4 with a projecting lever 24 by which the pawl islifted from engagement with the ratchet 8 when it is desired. to unlockthe cam part D and return the same to non-operative position. It isobvious that the cam part D may be locked in position at any stage ofits rotation and in this way allowance is made for providing a firmbrace for the head of a rivet of any thickness or for variations indistance from the head of the rivet to the brace C when in non-operativeposition.

The brace bar A is firmly secured to the materials to be rivetedtogether by means of securing plugs F, F, Figs. 1 6, 7 and 9. The shaft25, Fig. 7, of the plug F, which is inserted into the rivet hole andthrough the end. of the brace bar A, is provided at its lower end witha' lip or projection .26. The width of the shaft 25 and the projection26 are together slightly less than the width of the rivet hole intowhich it is to be inserted. The shaft 25 is also provided at the upperend with two projecting parts, one of which, 27, Figs. 6, 7 and 9, islocated below the end of the brace bar A and the other 28, Figs. 6, 7and 9, which is located above the end of such bar A. Such projectingparts securethe bar it against up and down motion when the device is inoperation. The plug F, Figs. 6, 7, 8 and 9, is also provided with aplunger wedge part 29 of crescent shape which fits around the shaft 25.The width of the part 29 is the same as the width of the projecting part26. The under face of the wedge part 29 is at an acute angle to theshaft 25 and to the surface of the material to be riveted together.Inserted into the upper face of the wedge part 29 is a plunger bar 30,Figs. 7 and 8. projecting through an orifice in the projecting part 27and through the end of the brace bar A. Around the plunger bar 30, Fig.7, between the part 27 and the wedge part 29 is a stiff coil spring 31which presses downwardon the part 29 and keeps the part 29 normallyextended to the limit of its motion. When the plug F is inserted in arivet hole so that the projecting part 26 protrudes beyond the outersurface of the material to be riveted together. the plunger wedge part29 is manually forced downward into the rivet hole and as it.

presses against the side of the rivet forces the shaft 25 to the left,Fig. 7, and forces the projecting part 26 beneath the under surface ofthe material to be riveted together. W hen such part 29 is maintained inplace by the pressure of'the coil spring 31 and when both plugs F, F areinserted and secured, the device is secured in position ready foroperation.

The ends of the brace bar A, Fig. 5, curved downward so as to elevatethe main portion of such bar to a suitable distance above the materialto be riveted so that a hot rivet may be inserted into a rivet hole inthe material to be riveted together. The brace bar A: is provided at itsouter ends with slots 32 and 33, Fig. 1, parallel to the main part ofthe bar through which pass the plugs F, F. The plugs F, F may be movedback and forth in this slot until they come over convenient rivet holesinto which they may be inserted and in this way considerable latitude ispermitted in securing the brace bar A to the material to be rivetedtogether.

For convenience in assembling, the end of the movable collar B isremovable and is secured to the upper and lower sides by the bolts 3l'and 35, Figs. 1 and 8. In this way the collar B is easily mounted onthe brace bar A and as easily removed, for repair.

When the brace C has been. locked in position, or even before that time,the collar B is secured in position against sliding or movement alongthe bar A by means of the set screw 36, Figs. 1, 2 and The operation ofmy improved rivet brace is as follows: The brace bar A is secured inplace by inserting the securing plugs F, F into convenient rivet holesand adjusting the same. A hot rivet is inserted into a proper rivet holeand the movable collar B is slid along the brace bar A until the bracepart is over the head of the rivet. The lever 16 is pulled toward theoperator and down. The ratchet part 8 is thus actuated and presses uponthe coil spring 12 which in turn presses upon the projection 10 of thecam part D which is thus rotated. The rotation of the curved face ofthis cam part D and its pressure against the face 7 of the barce part Ccause the brace part to be depressed until it first comes in contactwith the head of the rivet and then presses the same firmly into therivethole.

The lever 16 is given an added pressure so as to compress the coilspring considerably. The pawl having travelled along the teeth of theratchet is locked in the last one reached by the releasing of the lever16. The device is now locked in operative position. When the rivet hasbeen driven, the lever 16 is depressed slightly to relieve the pressureon the pawl and the pawl is lifted out of engagement by the lever 2d andthe lever 16 raised to normal position. The brace C is raised by meansof the bar 18 be ing' attached to it and the cam part and is raised bythe lifting of the lever 16 and the rotation of the cam part. The deviceis now ready to be moved into position to perform the operation ofbracing another straight line and the shock of the rivet driving tool isborne directly by all parts of the device. The brace bar maybe providedwith a straight red at the ends instead of plugs which may be insertedthrough the rivet hole. Such rod will have a slot nearly toits end whichwill rivet hole. When passed through the hole it is secured in place bya wedge shaped. part passed through the slot and wedged tightly inplace. In this way the brace bar will be secured firmly in place. i I

In practice, the brace bar A is provided with several collar and braceparts so that when one rivethas been secured in place and the brace partlocked in position, the operator may at once proceed to insert anotherrivet and lock the san'ze in position so that when the rivet driver hasfinished driving the first rivet he may turn immediately to the second,third, etc. In this way the time and labor and strength oi allareconserved.

Claims.

1. In a device of the class described, a

brace for maintaining a rivet in place during the process of compressingthe shaft of the rivet and making a head on such shaft by blows from arivet-driving or headingtool, comprising a brace-bar; means for securing such brace-bar to the material to he riveted together; amovable-collar mounted on such brace-bar; a rivet-brace part supportedby the movable-collar; a cam-member for changing the position of andbracing; the rivet-brace part; and means for locking such cam-member,and rivet-brace part in position.

2. In a device of the class described, a brace for maintaining a rivetin place dur ingthe process of compressing the shaft of the rivet, andmaking a head on such shaft by the action of a rivet-driving or headingtool; and means for driving a plurality of rivets without removing thebrace from the material to be riveted together comprising a brace-bar;neans for securing such bracebar to the material to be riveted together;a collar movably mounted on the brace-bar;

the brace bar,.the rivet holes and the brace part are in a projectbeyond thea rivet-brace part member carried by the collar; a cam-partmember forchanging the position of and bracing such rivet-brace partmember; and means for locking such campart-member and rivet-brace partmember in position.

3. In a device of the class described, a main-support; means forremovably attachingthe main-support to the stock to be riveted bysecuring-means coacting with holes -formed in and thru the stock to-beriveted at one end and with the main support at the other; asecondary-support slidably mounted upon the main-support; a rivet-bracemember movably carried by the secondarysupport; a cam-member for forcingthe rivet-brace member against the rivet to be headed; and a movablelever actuated by the operator for moving the cam-member into and out ofrivet-bracing position. v

4. In a device of the class described, a brace-bar; securing-membersadjacent to the ends of the brace-bar connecting therewith at one end,and having their further ends passing thru holes formed inand thru thestock to be riveted, and removably but securely locked againstaccidental removal from such holes; a support slidably mounted upon thebrace-bar; a rivet-brace member mounted in the support so as to movetherein toward and away from the brace-bar; a can'i-member interposedbetween the slidingsupport and the rivet-brace member and connectingtherewith in such manner as to force them together when moved in onedirection, and apart when moved in the other and rivet-bracingdirection; means for ac- ,7 tuating the cam-member controlled by theoperator; and a ratchet-and-pawl locking mechanism for lockmg thecam-member and rivet brace member against movement when in position tohold the rivet in being headed.

5. In a device of the class described; a brace-bar having supporting andsecuring end-portions extending at an angle away from the central andmain body or slide portion of the brace-bar; securing-members coactingat one end with the securing; end portions of the brace-bar and at theother with holes formed in and thru the stock to be riveted, so as toremovably but securely lock the brace-bar in position on the stock; arivet-brace member: a support slidably mounted upon the brace-barcarrying the rivet-brace member in such manner that the place while samemay be moved therein to and from the brace-bar; mechanism for so movingthe rivet-brace member; and mechanism for locking such mechanism againstmovement when the rivet-brace member is in the rivetbracing and holdingposition.

JAMES A. TAYLOR.

